INVESTMENT SECURITIES - Amortized cost and fair value of securities held-to-maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	$ 98,276		$ 75,795
Gross Unrecognized Gains	309		5
Gross Unrecognized Losses	(4,996)		(7,639)
Fair Value	93,589		68,161
Allowance for Credit Losses	(71)		(71)
U.S. Treasury debt
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	247		246
Gross Unrecognized Gains	1		0
Gross Unrecognized Losses	0		(4)
Fair Value	248		242
Allowance for Credit Losses	0		0
Corporate bonds
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	24,579		23,578
Gross Unrecognized Gains	103		0
Gross Unrecognized Losses	(1,669)		(2,801)
Fair Value	23,013		20,777
Allowance for Credit Losses	(71)	$ (71)	(71)	$ (71)	$ (71)	$ (71)
GNMA MBS – residential
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	27,164		31,361
Gross Unrecognized Gains	6		0
Gross Unrecognized Losses	(2,468)		(3,383)
Fair Value	24,702		27,978
Allowance for Credit Losses	0		0
FNMA MBS – residential
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	24,639		12,011
Gross Unrecognized Gains	155		0
Gross Unrecognized Losses	(407)		(689)
Fair Value	24,387		11,322
Allowance for Credit Losses	0		0
Government CMO and MBS – commercial
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	7,678		5,075
Gross Unrecognized Gains	18		5
Gross Unrecognized Losses	(300)		(483)
Fair Value	7,396		4,597
Allowance for Credit Losses	0		0
Corporate CMO and MBS
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	13,969		3,524
Gross Unrecognized Gains	26		0
Gross Unrecognized Losses	(152)		(279)
Fair Value	13,843		3,245
Allowance for Credit Losses	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0